Editor’s note: Rob’s review originally ran during Sundance earlier this year, but we’re re-running it now as the film releases on VOD tomorrow. And, not for nothing, but it’s still the best movie of the year so far. Shane Carruth has twice broken an unspoken contract between filmmakers and audiences that says watching movies should never require you to think, work or do any of the heavy lifting. A high percentage of film-goers and way too many filmmakers signed on to this arrangement, but small numbers of each stand strong in their defense of difficult and unconventional films. Those movies aren’t better by default, many of them are flat-out unwatchable in fact, but when they work, when everything falls into place… audiences are rewarded with something truly special. Carruth chose not to dumb down his debut, Primer, and while the dense dialogue left many viewers in its wake, those who remained enjoyed a smart and tightly-wound little time travel tale at the heart of something more personal. His long-awaited follow-up, Upstream Color, sees him breaking the rules again but with a far bigger, bolder and more aggressively challenging film that for better or worse ups the ante in every regard.